In the trunk set up there is an option for maximum channels. If set to 1 on a trunk, and the same trunk is selected in an outbound route, any second call should route to the next trunk in the outbound routing trunk list, however does not.
in other words, I do not believe MAXIMUM CHANNELS in the trunks is working, as I have a trunlk that permits only 1 call at a time. When I go to make a second call, all I get is a fast busy, rather tghan having the call routed by the second choice in the outbound routing list.
I have the same issue. I tried it with two different providers and had no success. If I change the order of the providers each is working but no second call.